近义词知多少答:19.脆弱的 brittle, fragile, vulnerable, feeble, weak, be susceptible to, be subject to 20.受伤 bruise, hurt, injury, wound, injure, impair 21.建立 build, construct, found, erect, establish, fabricate 22.冲突 bump, clash, collide, conflict 23.忙碌的 busy, engaged, occupied 24....